removefrombookshelfevent.java

一个在线学习系统的服务端SERVLET程序

package eols.event.user;

import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;

import eols.bean.system.*;
import eols.tools.*;
import eols.storage.user.UserStorageManager;
import eols.event.system.*;
import eols.bean.user.UserData;

public class RemoveFromBookShelfEvent
    extends EventHandlerBase {

        /**
         * 事件的处理逻辑
         */
        public void process(ServletContext sc, HttpServletRequest request,
                            HttpServletResponse response, HashMap bean) {

            String loginID = SessionUtils.getStringSessionAttribute(request, "loginID", null);
            if (loginID == null) {
                throw new RuntimeException("Can not get your login information, please login");
            }
            String courseID = request.getParameter("courseID");
            if (UserStorageManager.removeFromBookShelf(loginID, courseID)) {
                Result result = new Result();
                result.setHandleResult("The course is removed from your bookshelf successfully.");
                request.setAttribute("result", result);
            }

        }
}